Estuarine fine particles enhance nitrogen elevation and nutritional imbalance in coastal and offshore waters
文献类型：期刊论文
| 作者 | Kong, Xiangmin1,2,3; Hu, Nana1,2,3; Wang, Wenjing1,2; Li, Zhaoran1,2; Wang, Zheng1,2,3; Wang, Hankun1,2; Sheng, Yanqing1,2 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 659页码:13 |
| 关键词 | Yellow River Estuary Suspended particulate matter Nitrogen Particle sizes Accumulation and migration Water quality evolution |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2025.133179 |
| 通讯作者 | Sheng, Yanqing(yqsheng@yic.ac.cn) |
| 英文摘要 | Nitrogen (N) in suspended particulate matter (SPM) plays a vital role in estuarine and coastal ecosystems. However, the accumulation and migration processes of N in SPM and their effects on water quality evolution are still unclear. This study utilized three methods (gravity-setting, dry sieving, and wet sieving) to categorize the particle size of SPM in the Yellow River Estuary (YRE). Simulated tests and the field sampling of SPM in the YRE were conducted to examine N accumulation and migration patterns in SPM across different salinity levels, particle sizes and migration distance. Adsorption experiment was used to investigate the potential impact of N in SPM on water quality evolution. The results indicated that SPM could be effectively sorted into distinct particle size groups through gravity-setting, and fine-grained SPM contributed to accumulating N under low salinity. The SPM with the largest particle size at a salinity of 33 PSU presented the lowest TN concentration of 818.4 mg center dot kg- 1. In comparison, the SPM with the smallest D50 at a salinity of 0.48 PSU exhibited the highest TN (2438 mg center dot kg- 1). Microbial community analysis underscores the microbial-mediated mechanisms driving N dynamics in SPM. Cyanobacteria play a crucial role in N accumulation in fine-grained SPM, while salinity and N concentration significantly influenced the distribution of key bacterial phyla (e.g. Proteobacteria and Planctomycetota). Additionally, fine-grained SPM tends to suspend in the water column and are carried by river flow towards offshore, the sampling point located furthest from the YR mouth (N8) recorded the highest TN concentration of 1973 mg center dot kg- 1 in SPM. During the migration process, the release potential of N in SPM has significantly increased, thereby exacerbating the risk of N pollution and N/P ratio imbalance in seawater. This study presents a novel perspective on addressing N pollution and N/P ratio imbalance, highlighting the significance of intercepting fine particles for effective N management in estuarine and coastal zones. |
| WOS关键词 | SUSPENDED SEDIMENT ; PHOSPHORUS ; IMPACT |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001471963000001 |
| 资助机构 | National Key Research and Development Program of China ; Key Project of Shandong Provincial Natural Science Foundation |
| 源URL | [http://ir.yic.ac.cn/handle/133337/40879]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Sheng, Yanqing |
| 作者单位 | 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Shandong, Peoples R China 2.Shandong Acad Environm Planning, Key Lab Land & Sea Ecol Governance & Systemat Regu, Jinan, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Xiangmin,Hu, Nana,Wang, Wenjing,et al. Estuarine fine particles enhance nitrogen elevation and nutritional imbalance in coastal and offshore waters[J]. JOURNAL OF HYDROLOGY,2025,659:13. |
| APA | Kong, Xiangmin.,Hu, Nana.,Wang, Wenjing.,Li, Zhaoran.,Wang, Zheng.,...&Sheng, Yanqing.(2025).Estuarine fine particles enhance nitrogen elevation and nutritional imbalance in coastal and offshore waters.JOURNAL OF HYDROLOGY,659,13. |
| MLA | Kong, Xiangmin,et al."Estuarine fine particles enhance nitrogen elevation and nutritional imbalance in coastal and offshore waters".JOURNAL OF HYDROLOGY 659(2025):13. |
入库方式： OAI收割
来源：烟台海岸带研究所
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